Horseshoe.



J. A. BILLADO. HORSESHOE. APPLICATION FILED JAN.12,1911.

1,027,804. Patented May 28, 1912.

Wne ss nventor Attorneys UNITED STATES PATENT OFFICE.

JASON A. IBILLADO, OF RUTLAND, VERMONT, ASSIGNOR OF ONE-HALF TO WALLACE W. NICHOLS, 0F RUTLAND, VERMONT.

HORSESI-IOE.

Specification of Letters Patent.

Application filed January 12, 1911.

Patented May 28,1912.

Serial No. 602,299.

To all whom it may concern.

Be it known that I, JAsoN A. BILLADO, a citizen of the United States, residing at Rutland, in the county of Rutland and State of Vermont, have invented a new and useful Horseshoe, of which the following is a specification.

This invention relates to horse shoe calks and consists in the novel arrangement of its parts as hereinafter described and claimed.

The object of the invention is to provide calks of simple structure which may be easily and quickly detachably applied to a shoe and which when in position are ef.

fectually seated thereon the parts of the calks at the heel and toe of the shoe being so proportioned and arranged as not to interfere with the free action or movement of the animal and at the same time being so arranged that the animal may attain a secure footing.

In the accompanying drawing :-Figure 1 is an under plan view of a shoe with the end portions thereof slightly distorted showing the calks in position upon the same. Fig. 2 is a side elevation of the shoe showing the calks in positionthereon. Fig. 3 is a sectional view of one of the heel calks cut on the line 3-3 of Fig. 1. Fig. 4 is a sectional view of the toe calk cut on the line H of Fig. 1.

The toe calk consists of a bracket portion 1 having a bit portion 2 attached integrally thereto and a plurality of screws 3 pass transversely through the bracket portion 1 and secure the same to the under face of the shoe. The bit portion 2 is provided at its ends with rearwardly disposed flanges 4L and at a point intermediate its ends with a rearwardly disposed flange 5. The flange 5 projects rearwardly to a greater extent than the flanges 4L and the said flanges extend along the sides of the securing screws 3 and partially house the heads of the same. The shoe-bearing surface 6 of the bracket portion 1 is at an obtuse angle to the forward side 7 of the bit portion 2 of the said calk and the rear sides of the calk together with the rear edges of the flanges 4 and 5 incline forwardly and downwardly and cross the plane of the inclined side 7 at the lower end of the bit 2.

The shoe is provided upon its under side and in the vicinity of its ends with transversely disposed V -shaped grooves 8 and the heel calks are provided at their upper ends with lugs 9 which are snugly received by the said grooves 8. The bracket portions 10 of the heel calks are integrally joined with the bit portions 11 thereof and securing screws 12 pass through the said bracket portions 11 and hold the heel calks in place upon the rear end of the shoe. Each heel calk is provided at its opposite sides with flanges 13 which extend back and merge into the bracket portion 10 at opposite sides of the head of the screw 12 and the said flanges therefore partially house the heads of the screws. The shoe'bearing surfaces 14E of the bracket portions 10 of the heel calks are at acute angles to the rear side surfaces 15 of the bit portions 11 of the said heel calks. The forward edges of the flanges 13 are rearwardly and downwardly inclined and cross the plane of the rear side 15 of the bit 11 at the lower end of the said bit. The forward surface 7 of the toe calk is not exactly parallel with the angle of inclination of the rear surface 5 of the heel calk although the said surfaces extend in the same general direction. The forward surfaces of the bits 11 of the heel calks incline rearwardly and downwardly toward the rear surfaces 15 of the bits of the said calks.

hen the calks are applied to a shoe as indicated and the animal is moving the lower edge of the bit 2 at the toe calk will cut down into the roadway or material upon the surface of the roadway as the animal swings its hoof upon its ankles and the bits 11 of the heel calks will be drawn out of the surface of the roadway or material uponthe surface thereof and thus the animal has free ankle movement. This is due to the fact that the lower edge of the bit 2 of the toe calk serves as a fulcrum point for the shoe while the forwardly inclined surfaces 15 of the heel calks will permit sufficient clearance to allow the said heel calks to withdraw from the surface of the roadway or material upon the same. The forward portions of the heel calks are preferably hardened (by any suit-able process) while the rear portions of the said heel calks are permitted to re main in a relatively soft state. Therefore as the said heel calks wear the softer rear portions thereof will be removed while the forward hard portions remain, and this will have a tendency to preserve edges at the lower end of the bit 11 of the said calks.

Broadly speaking, the rear heel calk is arched in cross section, the convexed extrados of the calk being at the rear, and the concaved intrados being at the front. Obviously, the thrust of the earth against, the calk is in a forward direction and the tendency of the calk is to break in a rearward direction. The rear face of the calk will break due to tensile strain, and the front face of the calk will break due to compressive strain. By fashioning the rear face of the calk relatively soft, as hereinbefore set forth, the rear portion of the calk is given a maximum tensile strength, while the forward face of the calk is given a maximum compressive strain.

Referring particularly to Fig. 3 is will be seen that the rear calk presents approximately, the problem of a loaded, projecting channel beam. The thrust of the earth against the calk is in the direction of the arrow X, and the calk will tend to bend in the direction of the arrow Y. This tendency of the calk to bend in the direction of the arrow Y will be offset by reason of the fact that, as above stated, the forward portions of the heel calks are preferably hardened, while the rear portions of the heel calks are permitted to remain in a relatively soft state. 7

In Fig. 8 of the drawings, the hardened portion of the calk is denoted by the reference character R, and the softer portion of the calk is denoted by the reference character S. This softer portion S will have greater tensile strength than the hardened portion H. If the calk is to bend in the direction of the arrow Y, the portion S must be elongated, and the portion H must be compressed. Owing to the relatively great tensile strength of the part S, this part will resist elongation, while the harder part H will resist compression.

Having described the' invention what I claim as new and desire to secure by Letters Patent is l. A horse shoe calk which in transverse section is arched toward the rear of the shoe, the extrados of the arched portion being fashioned from softer metal than is the intrados of the arched portion, whereby, when a rearward thrust is exerted by the animal, the extrados will afford maximum tensile strength, and the int-rados will afford maXimum compressive strength.

2. A horse shoe having a heel calk projecting therefrom, the heel calk being arched in transverse section, toward the rear of the shoe, the rear face of the calk being fashioned from softer metal than is the; forward face of the calk, whereby, when a forward thrust is exerted against the calk, tending to bend the calk forwardly, the rear face of the calk will resist elongation, and the for ward face of the calk will resist compression.

In testimony that I claim the foregoing 'as my own, I have hereto affixed my signature in the presence of two witnesses.

HOWARD J. BAIN, CATI-IARINE M. DALEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

